Choosing summer employment

HI! I'm a freshman mechanical engineer in Cooper Union and you are such an inspiration!You could say I'm going through a dilemma right now. Classes are tough and I can't imagine myself becoming a good engineer because of my inexperience and ignorance. I know for my future's sake, for summer income, I should go for an engineering internship, but I don't have the requirements (GPA<3.0) and I feel like I'm not ready for it and kind of intimidated. My other option is to teach at a summer school. Should I continue striving for a engineering internship over the summer? Thank you!!!!!!